Reading, therefore, is a co-production between writer and reader. The simplicity of this tool is astounding. So little, yet out of it whole worlds, eras, characters, continents, people never encountered before, people you wouldn't care to sit next to in a train, people that don't exist, places you've never visited, enigmatic fates, all come to life in the mind, painted into existence by the reader's creative powers. In this way the creativity of the writer calls up the creativity of the reader. Reading is never passive.